Including UK VAT*

What You Will Learn 

Create beautiful half-sphere paperweights that express your personality. During this workshop, we will explore the possibilities of mixing different techniques such as kiln casting, imagery within the glass, and fire polishing. Silvia will lead you in the process of making shiny objects with inner floating images and words.

See more of Silvia's work via her website: 

Silvia Levenson Casting Half Spheres Materials List.pdf

Duration and Place

Duration: 3 weeks, one session per week - a total of 4.5 hours

Online Course

Please note that classes may be slightly longer or shorter depending on student questions.

Session times

  • Tuesday 5th December 2023- 5:30 pm-7 pm UK time (1.5 hours)
  • Tuesday 12th December 2023- 5:30 pm-7 pm UK time (1.5 hours)
  • Tuesday 19th December 2023 - 5:30 pm-7 pm UK time (1.5 hours)

Class Description

This 3-session class will cover the creation of a glass half-sphere paperweight and the use of imagery to create a personalise your piece:

  • Finding inspiration 
  • Investigating other artists' work
  • Mould making
  • Creating imagery with depth using stamps, powders, and decals
  • Divesting your piece
  • Firing schedules
  • Cold working

Workshop Outcome:

  • Multiple Glass Casts of Half Spheres 

How it Works: 

  • The course is made up of three live and interactive online sessions using the Zoom platform. You will find the zoom link via the week's chapters in the navigation panel. 
  • Silvia will give a step-by-step tutorial with demonstrations, and you will have ample opportunity to ask her questions during the live class
  • Each week they will demonstrate a technique for you to try between sessions
  • A member of the Glass School team will also be in the Zoom class to assist you and Silvia
  • Mix with Silvia and other students on our dedicated community page, open for the duration of the course. Then join our exclusive Glass School UK Online Glass Community Facebook group to continue to mix with those who have attended any of our online masterclasses
  • A materials list is provided in the course navigation panel, so you can purchase what you need to create your pieces during the course. You don’t need absolutely everything on this list to be successful, Silvia will discuss different ways to reach our technical goals

We believe that this is the best way to get the very most from the course, but if this doesn’t suit you that’s fine: - If you can’t get to your studio, you can still learn the techniques and benefit from Silvia's extensive knowledge without making the pieces during the course itself.

This is a live online masterclass, but in case a student experiences issues with internet connection during the live class, a recording of each live session will be available to view until two weeks after the final session. This cannot be downloaded or shared and is only available for this limited time. By participating you agree to be recorded for this purpose.

These recordings will be available in the course navigation panel. 

What to Prepare

  • You will need a computer, tablet, or phone with a camera and microphone in order to join the online classroom. If you are unfamiliar with using Zoom then please take some time to look at our guide, available in the navigation panel. 
  • You should have a reliable internet connection, fast enough to make video calls or stream videos
  • Please read the Student Participation Agreement
  • Ensure that you have checked the materials list and purchased any materials you may require 
  • A pen and paper to take any notes. 
  • We restrict the class size to 25 people
  • We teach using Bullseye Glass (CoE90)


We are committed to maintaining a respectful community where all our students can learn and develop their full potential, within a safe environment.

If you have a disability or any specific requirements, please do not hesitate to contact us prior to your lesson so we can accommodate you.

*Price excluding VAT is £112.50. The correct tax will be calculated at checkout based on your location.

Cancellations up to 2 weeks before the course receive a 90% refund, after that date, a 50% refund will be given up to one week prior to the course, and no refund is given for cancellations after this time. In order to keep class costs low for all, we make no exceptions to this policy. In order to cancel your place on the course please contact [email protected] 

Course Curriculum

    1. Welcome

    2. Course Overview

    3. Student Participation Agreement

    4. Join the Community!

    5. How to Navigate the Community Page

    6. Materials List

    7. How to Download your Materials List!

    8. A Guide to Zoom and the Live Session

    9. All Set for the First Session!

    1. Welcome to Week One

    2. Course Handout

    3. Firing Schedules in C & F

    4. Warm Glass Plaster Calculations

    5. Zoom Link - Week One - Silvia Levenson - Tuesday 5th December 2023

    6. Week One - Recording

    7. Silvia's Calculation Notes

    1. Week One Presentation

    2. Firing #1 for Glass Scraps C and F

    1. Welcome to Week Two

    2. Printing

    3. Zoom Link - Week Two - Silvia Levenson - Tuesday 12th December 2023

    4. Week Two - Recording

    1. Decals

    2. Powder Printing

    1. Welcome to Week Three

    2. Casting Notes

    3. Zoom Link - Week Three - Silvia Levenson - Tuesday 19th December 2023

    4. Week Three - Recording

About this course

Silvia Levenson

Originally from Buenos Aires, Argentina, Silvia Levenson emigrated to Italy in 1981, during the "disappearances" of the Dirty War. In 2004, Levenson received the Rakow Commission Award from the Corning Museum of Glass in New York, and in 2008 she was shortlisted for the Bombay Sapphire Prize. Her work has been exhibited around the world and is part of the collections of the Corning Museum of Glass in New York, the Toledo Museum of Art, the Museo del Vidrio in Argentina, the Museo del Vetro in Italy, and the Museum of Fine Arts in Houston, Texas.

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